Carbon cloth‐MnO₂ nanotube composite for flexible supercapacitor

Abstract

Abstract Three‐dimensional MnO 2 nanorods were synthesized on a carbon cloth (CC) via hydrothermal method to fabricate binder‐free electrode for flexible supercapacitor application. The fabricated MnO 2 /CC electrode exhibits specific capacitance of 487 F g −1 at current density of 2 A g −1 in conventional three electrode system using 1 M Na 2 SO 4 electrolyte. Furthermore, a flexible symmetric supercapacitor is assembled using 1 M Na 2 SO 4 electrolyte which shows maximum specific capacitance of 232 F g −1 at current density of 0.5 A g −1 . The supercapacitor exhibits specific energy up to 5.18 Wh kg −1 and specific power of 242 W kg −1 at 0.5 and 1.0 A g −1 , respectively. Furthermore, the supercapacitor exhibits specific capacitance retention of 91.7% over 1000 charging discharging cycles. The attractive performance suggests that MnO 2 /CC supercapacitor has potential application for energy storage.